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Article

Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation

by
Karel Frydrýšek
1,2,*,
Šárka Michenková
1,
Leopold Pleva
2,3,
Jan Koutecký
4,
Jiří Fries
1,
Kateřina Peterek Dědková
5,
Roman Madeja
2,3,
Antonín Trefil
1,
Pavel Krpec
6,
Tomáš Halo
1,2,
Leopold Hrabovský
1,
Lubor Bialy
2,3,
Roland Jančo
7 and
Jiří Pokorný
8
1
Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic
2
Faculty of Medicine, University of Ostrava, Syllabova 19, 703 00 Ostrava-Vítkovice, Czech Republic
3
Trauma Center, University Hospital Ostrava, 17. listopadu 1790, 708 52 Ostrava-Poruba, Czech Republic
4
Medin, a.s, Vlachovicka 619, 592 31 Nové Město na Moravě, Czech Republic
5
Center of Advanced Innovation Technologies, VSB-Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic
6
V-NASS, a.s., Halasova 2938/1a, 703 00 Ostrava-Vítkovice, Czech Republic
7
Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava, Námestie Slobody 17, 812 31 Bratislava 1, Slovakia
8
Faculty of Safety Engineering, VSB-Technical University of Ostrava, Lumírova 630/13, 700 30 Ostrava-Výškovice, Czech Republic
*
Author to whom correspondence should be addressed.
Appl. Sci. 2021, 11(12), 5616; https://doi.org/10.3390/app11125616
Submission received: 15 January 2021 / Revised: 10 February 2021 / Accepted: 2 March 2021 / Published: 17 June 2021
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Abstract

This article deals with a new original analytical solution of deformation, force and stress states in wood screw joints up to the limit values of pulling out/breaking the screw. The screws are under tension. The wood-to-screw interaction is effectively simplified by introducing several physical model variants using a tangential elastic non-linear foundation. The experimental verification of the proposed models using pull-out tests (i.e., pulling out screws from dry spruce wood in laboratory conditions) confirms the correctness of the proposed models of the elastic linear/non-linear foundation. The validity of the model is also analytically and experimentally verified in the biomechanical model of pulling out screws from the femur of a bovine/human cadaver, which confirms and expands the validity of newly designed screw joint models outside the timber structure area.
Keywords: screw joints; tensile stress; pull-out test; analytical and experimental solution; wood; tangential elastic foundation; material models screw joints; tensile stress; pull-out test; analytical and experimental solution; wood; tangential elastic foundation; material models

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MDPI and ACS Style

Frydrýšek, K.; Michenková, Š.; Pleva, L.; Koutecký, J.; Fries, J.; Peterek Dědková, K.; Madeja, R.; Trefil, A.; Krpec, P.; Halo, T.; et al. Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation. Appl. Sci. 2021, 11, 5616. https://doi.org/10.3390/app11125616

AMA Style

Frydrýšek K, Michenková Š, Pleva L, Koutecký J, Fries J, Peterek Dědková K, Madeja R, Trefil A, Krpec P, Halo T, et al. Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation. Applied Sciences. 2021; 11(12):5616. https://doi.org/10.3390/app11125616

Chicago/Turabian Style

Frydrýšek, Karel, Šárka Michenková, Leopold Pleva, Jan Koutecký, Jiří Fries, Kateřina Peterek Dědková, Roman Madeja, Antonín Trefil, Pavel Krpec, Tomáš Halo, and et al. 2021. "Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation" Applied Sciences 11, no. 12: 5616. https://doi.org/10.3390/app11125616

APA Style

Frydrýšek, K., Michenková, Š., Pleva, L., Koutecký, J., Fries, J., Peterek Dědková, K., Madeja, R., Trefil, A., Krpec, P., Halo, T., Hrabovský, L., Bialy, L., Jančo, R., & Pokorný, J. (2021). Mechanics of Screw Joints Solved as Beams Placed in a Tangential Elastic Foundation. Applied Sciences, 11(12), 5616. https://doi.org/10.3390/app11125616

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